Processing basics

Marigold supports a wide variety of processing tools that share many components in common.

Selecting a product

The first decision for most tools is the input product for the process. This is often in the form of a dropdown list containing available products for selection.

Selecting bands

For most processes, you have the choice of what bands in the layer to process. For example, with hyperspectral datasets it is often useful to limit analysis to only the wavelengths corresponding to the minerals you are currently trying to indicate (eg, looking at bands from 2180-2225nm when mapping white micas).

For data without spectral bands, band selection will appear as a simple list of checkboxes.

Spectral data can be selected either with a list of checkboxes or by typing in the wavelengths to use.

After selecting desired bands, click the Update band selection button to show the position of the selected bands on the graph.

Selecting spectra

For processes that use spectral data such as spectral angle mapper, a list of available vectors and spectra will be presented as well. Spectra will be used directly, while selecting a vector will run the same process as extracting vector spectra to compute an average spectrum over the vector.

Selecting an AOI

Many processes use specific AOIs as input in addition to the layer itself. For example, PCA requires an AOI to compute the statistics which will be applied dynamically to the whole layer. These processes will contain a dropdown that will have all of your vector layers, as well as an option to compute over the current map viewport.

Output layers

Dialogs will have an area to input a name for the resulting output layer. Many dialogs will generate a "preview" layer with this name that will update as you adjust the parameters of the process. You can find this layer in your layer list, with all of the same configuration options as a normal layer.